Nickel-Graphite EMI Shielding Gaskets

There are many options for picking materials when constructing EMI shielding gaskets. Different metals and metal alloys provide end users different characteristics, which allow the shielding units to work in unique and diverse settings. Many factors must be considered when constructing shielding gaskets, and so final choices must be made depending on what will best suit your application needs. Although different materials work better under different circumstances, nickel-graphite silicone is one of the most commonly used alloys. The material acts like silicone rubbers, but it takes on the electrical properties of nickel.

  1. Nickel-graphite is used because it has a relatively small cost when compared to similar alloys like silver-aluminum. Nickel-graphite is also usually less expensive than elastomers containing silver-copper on the inside.
  2. Nickel-graphite is conductive, but not nearly as conductive as pure silver. Depending on the application, EMI shielding might not need the high-conductivity of silver. In particular cases, it is more practical to use nickel-graphite than silver or silver-aluminum
  3. By adding graphite to nickel, it is possible to lower the corrosion rate of the shield significantly. Silver, when mixed with silicones, can be problematic.

There are other reasons to consider getting nickel-graphite silicone EMI shields, but you must weigh your options against your application needs. We will help you determine the best materials for your EMI and RFI shields.